山口

mountain pass

nut (small piece at the peghead end of the fingerboard that holds the strings at the proper spacing and, the proper height on traditional Chinese stringed instruments such as pipa and sanxian)

blowing aperture (on the xiao, the Chinese vertical bamboo flute)

Yamaguchi (a prefecture of Japan)

Yamaguchi (a city in Yamaguchi Prefecture, Japan)

an orthographic borrowing of the Japanese surname 山口, Yamaguchi